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Irshad R, Raj N, Gabr GA, Manzoor N, Husain M. Integrated network pharmacology and experimental analysis unveil multi-targeted effect of 18α- glycyrrhetinic acid against non-small cell lung cancer. Front Pharmacol 2022; 13:1018974. [PMID: 36313358 PMCID: PMC9596789 DOI: 10.3389/fphar.2022.1018974] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 09/28/2022] [Indexed: 11/21/2022] Open
Abstract
Non-small cell lung cancer (NSCLC) is one of the most malignant types of cancer with soaring incidence rates worldwide, attributed to its heterogeneity and complex etiology. Evidently, alternative anti-cancer therapies comprising traditional medicines and natural products have gained attention for their ability to act as chemopreventive agents with minimal toxicities, either alone or in combination. Accumulating studies have substantiated the inevitability of network pharmacology studies for effectively mapping molecular targets of natural products against multifaceted diseases, including cancer. The 18α-Glycyrrhetinic acid (18α-GA), a triterpenoid found in licorice plants, has shown promising medicinal properties, although, its mechanism of action against NSCLC yet remains elusive. The present study was conducted to explore the anti- NSCLC potential of 18α-GA, employing integrative network pharmacology, molecular docking, and experimental research. Initially, network analysis revealed 181 common targets of 18α-GA in NSCLC as shown in the “compound-target- disease” network employing Cytoscape 3.8.2. Further analyses identified EGFR, AKT1, PI3KR1, MAPK1, IGF1, and SRC as the most crucial hub targets of 18α-GA against NSCLC. Moreover, molecular docking simulations and functional enrichment analyses indicated the involvement of multiple signaling pathways in suppressing NSCLC. Subsequent in-vitro studies verified the antiproliferative effect of 18α-GA on two NSCLC cancer cell lines, H1299 and A549. Mechanistically, 18α-GA arrested cell cycle at the G1 phase, induced apoptosis, decreased migratory potential, and protein expression levels of EGFR-PI3K/AKT, as examined by flow cytometry, morphological assessment, RT-PCR, and western blot. In conclusion, this study delineates the therapeutic potential and underlying mechanism(s) of 18α-GA as a putative novel drug against NSCLC. However, further studies are warranted to elucidate the complete molecular mechanism(s) using animal models of NSCLC.
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Affiliation(s)
- Rasha Irshad
- Virology and Oncology Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi, India
| | - Nafis Raj
- Medical Mycology Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi, India
| | - Gamal A. Gabr
- Department of Pharmacology and Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al- Kharj, Saudi Arabia
| | - Nikhat Manzoor
- Medical Mycology Lab, Department of Biosciences, Jamia Millia Islamia, New Delhi, India
| | - Mohammad Husain
- Virology and Oncology Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi, India
- *Correspondence: Mohammad Husain,
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Heme Oxygenase-1 Inhibits the Proliferation of Hepatic Stellate Cells by Activating PPARγ and Suppressing NF-κB. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:8920861. [PMID: 35047060 PMCID: PMC8763483 DOI: 10.1155/2022/8920861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/22/2022]
Abstract
Background Hepatic stellate cells (HSCs) are reported to play significant roles in the development of liver fibrosis. Heme oxygenase-1 (HO-1) is a key rate-limiting enzyme, which could decrease collagen synthesis and liver damage. Nevertheless, it was yet elusive towards the function and mechanism of HO-1. Methods An HO-1 inducer Hemin or an HO-1 inhibitor ZnPP-IX was used to treat the activated HSC-T6, respectively. MTT assay was adopted to detect cell proliferation. Immunocytochemical staining was employed to test the levels of alpha-smooth muscle actin (α-SMA), peroxisome proliferator-activated receptor-γ (PPARγ), and nuclear factor-kappa B (NF-kappa B) levels in HSC-T6. HO-1, PPARγ, and NF-κB expression levels were measured by qRT-PCR and Western blotting. ELISA was then used to detect the levels of transforming growth factor- (TGF-) beta 1 (TGF-β1), interleukin-6 (IL-6), serum hyaluronic acid (HA), and serum type III procollagen aminopeptide (PIIIP). Results HSC-T6 proliferation was inhibited in Hemin-treated HSCs. The levels of α-SMA, HA, and PIIIP and the production of ECM were lower in Hemin-treated HSCs, whereas those could be rescued by ZnPP-IX. NF-κB activation was decreased, but PPARγ expression was increased after HO-1 upregulation. Furthermore, the levels of TGF-β1 and IL-6, which were downstream of activated NF-κB in HSC-T6, were reduced. The PPAR-specific inhibitor GW9662 could block those mentioned effects. Conclusions Our data demonstrated that HO-1 induction could inhibit HSC proliferation and activation by regulating PPARγ expression and NF-κB activation directly or indirectly, which makes it a promising therapeutic target for liver fibrosis.
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de Souza Basso B, Haute GV, Ortega-Ribera M, Luft C, Antunes GL, Bastos MS, Carlessi LP, Levorse VG, Cassel E, Donadio MVF, Santarém ER, Gracia-Sancho J, Rodrigues de Oliveira J. Methoxyeugenol deactivates hepatic stellate cells and attenuates liver fibrosis and inflammation through a PPAR-ɣ and NF-kB mechanism. JOURNAL OF ETHNOPHARMACOLOGY 2021; 280:114433. [PMID: 34280502 DOI: 10.1016/j.jep.2021.114433] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/02/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Studies have shown interest in nutraceuticals for the prevention of liver diseases. Methoxyeugenol, is a molecule found in foods, such as nutmeg (Myristica fragrans Houtt.) and Brazilian red propolis. These two sources of methoxyeugenol, propolis and nutmeg, are used in folk medicine for the treatment of hepatic and gastrointestinal disorders, although little is known about their effects on the prevention of liver fibrosis. Natural PPAR (Peroxisome proliferator-activated receptor) agonists would represent unique molecules for therapy, considering the lack of therapeutics to treat liver fibrosis in chronic liver disease. Thus, investigation on new alternatives are necessary, including the search for natural compounds from renewable and sustainable sources. Liver fibrosis is a pathological process characterized by an exacerbated cicatricial response in the hepatic tissue, which compromises liver function. Therefore, inhibition of HSC (hepatic stellate cell) activation and hepatocyte damage are considered major strategies for the development of new anti-fibrotic treatments. AIM OF THE STUDY This study aimed to investigate the effects of methoxyeugenol treatment on HSC phenotype modulation in human and murine cells, hepatocyte damage prevention, and protective effects in vivo, in order to evaluate its therapeutic potential for liver fibrosis prevention. METHODS We investigated the effects of methoxyeugenol in (i) in vitro models using human and murine HSC and hepatocytes, and (ii) in vivo models of CCl4 (carbon tetrachloride) -induced liver fibrosis in mice. RESULTS We herein report that methoxyeugenol decreases HSC activation through the activation of PPAR-ɣ, ultimately inducing a quiescent phenotype highlighted by an increase in lipid droplets, loss of contraction ability, and a decrease in the proliferative rate and mRNA expression of fibroblast markers. In addition, methoxyeugenol prevented hepatocytes from oxidative stress damage. Moreover, in mice submitted to chronic liver disease through CCl4 administration, methoxyeugenol decreased the inflammatory profile, liver fibrosis, mRNA expression of fibrotic genes, and the inflammatory pathway signaled by NF-kB (Nuclear factor kappa B). CONCLUSION We propose methoxyeugenol as a novel and potential therapeutic approach to treat chronic liver disease and fibrosis.
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Affiliation(s)
- Bruno de Souza Basso
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Gabriela Viegas Haute
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Martí Ortega-Ribera
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Lab, IDIBAPS Biomedical Research Institute - CIBEREHD, Barcelona, Spain
| | - Carolina Luft
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Géssica Luana Antunes
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Matheus Scherer Bastos
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Leonardo Pfeiff Carlessi
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Vitor Giancarlo Levorse
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Eduardo Cassel
- School of Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Márcio Vinícius Fagundes Donadio
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Eliane Romanato Santarém
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Jordi Gracia-Sancho
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Lab, IDIBAPS Biomedical Research Institute - CIBEREHD, Barcelona, Spain
| | - Jarbas Rodrigues de Oliveira
- School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
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Abstract
Introduction: Hepatic stellate cells (HSCs) are essential for physiological homeostasis of the liver extracellular matrix (ECM). Excessive transdifferentiation of HSC from a quiescent to an activated phenotype contributes to disrupt this balance and can lead to liver fibrosis. Accumulating evidence has suggested that nuclear receptors (NRs) are involved in the regulation of HSC activation, proliferation, and function. Therefore, these NRs may be therapeutic targets to balance ECM homeostasis and inhibit HSC activation in liver fibrosis.Areas covered: In this review, the authors summarized the recent progress in the understanding of the regulatory role of NRs in HSCs and their potential as drug targets in liver fibrosis.Expert opinion: NRs are still potential therapy targets for inhibiting HSCs activation and liver fibrosis. However, the development of NRs agonists or antagonists to inhibit HSCs requires fully consideration of systemic effects.
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Affiliation(s)
- Shiyun Pu
- Department of Pharmacy, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
| | - Hongjing Zhou
- Department of Pharmacy, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
| | - Yan Liu
- Department of Interventional Therapy, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
| | - Jiao Liu
- Department of Interventional Therapy, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
- Department of Hepatobiliary Surgery, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
| | - Yuanxin Guo
- Department of Pharmacy, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
| | - Houfeng Zhou
- Department of Pharmacy, Chengdu Fifth People's Hospital, Chengdu University of TCM, Chengdu, China
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Wei X, Zheng W, Tian P, Liu H, He Y, Peng M, Liu X, Li X. Administration of glycyrrhetinic acid reinforces therapeutic effects of mesenchymal stem cell-derived exosome against acute liver ischemia-reperfusion injury. J Cell Mol Med 2020; 24:11211-11220. [PMID: 32902129 PMCID: PMC7576231 DOI: 10.1111/jcmm.15675] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/04/2020] [Accepted: 06/15/2020] [Indexed: 12/20/2022] Open
Abstract
Recent studies have shown that mesenchymal stem cell‐derived exosome could attenuate ischaemia‐reperfusion (I/R) injury by suppressing inflammatory response in the liver. Glycyrrhetinic acid was also shown to be capable of repressing the TLR4 signalling pathway. However, it remains to be explored as whether the combined administration of mesenchyma stem cell (MSC)‐derived exosome and glycyrrhetinic acid (GA) could increase their therapeutic effects on I/R injury. Western blot was performed to evaluate the expression of proteins associated with inflammatory response in THP‐1 cells and I/R rat models treated under different conditions. Flow cytometry was carried out to analyse the proportions of different subtypes of peripheral blood cells in I/R rats. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were measured to assess the liver injury in I/R rats. Combined treatment with MSC‐derived exosome and GA effectively maintained the expression of key proteins involved in inflammatory response in LPS stimulated THP‐1 cells and THP‐1 cells treated under hypoxia conditions. In the established of I/R rat models, GA administration reinforced the therapeutic efficiency of MSC‐derived exosomes by maintaining the proportion of different subgroups of peripheral blood cells, decreasing the concentration of ALT and AST, and restoring the expression of dysregulated proteins associated with inflammation. Our results demonstrated that treatment with exosomes derived from mesenchymal stem cells (MSCs) attenuated liver I/R injury, while the pre‐treatment with GA may further promote the therapeutic effect of mesenchymal stem cell‐derived exosome against acute liver ischaemia‐reperfusion injury.
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Affiliation(s)
- Xiaolin Wei
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
| | - Wenjing Zheng
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
| | - Peikai Tian
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
| | - Hui Liu
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
| | - Yong He
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
| | - Minjie Peng
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
| | - Xiangde Liu
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China.,Department of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xiaowu Li
- Department of Hepatobiliary Surgery, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
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Ruan Q, Wang H, Burke LJ, Bridle KR, Li X, Zhao CX, Crawford DHG, Roberts MS, Liang X. Therapeutic modulators of hepatic stellate cells for hepatocellular carcinoma. Int J Cancer 2020; 147:1519-1527. [PMID: 32010970 DOI: 10.1002/ijc.32899] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/14/2020] [Accepted: 01/21/2020] [Indexed: 12/12/2022]
Abstract
Hepatocellular carcinoma (HCC) is the most common type of primary tumor in the liver and is a leading cause of cancer-related death worldwide. Activated hepatic stellate cells (HSCs) are key components of the HCC microenvironment and play an important role in the onset and progression of HCC through the secretion of growth factors and cytokines. Current treatment modalities that include chemotherapy, radiotherapy and ablation are able to activate HSCs and remodel the tumor microenvironment. Growing evidence has demonstrated that the complex interaction between activated HSCs and tumor cells can facilitate cancer chemoresistance and metastasis. Therefore, therapeutic targeting of activated HSCs has emerged as a promising strategy to improve treatment outcomes for HCC. This review summarizes the molecular mechanisms of HSC activation triggered by treatment modalities, the function of activated HSCs in HCC, as well as the crosstalk between tumor cells and activated HSCs. Pathways of activated HSC reduction are discussed, including inhibition, apoptosis, and reversion to the inactivated state. Finally, we outline the progress and challenges of therapeutic approaches targeting activated HSCs in the development of HCC treatment.
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Affiliation(s)
- Qi Ruan
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD, Australia
| | - Haolu Wang
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD, Australia.,Gallipoli Medical Research Institute, Greenslopes Private Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia.,Department of Biliary-Pancreatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Leslie J Burke
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD, Australia.,Gallipoli Medical Research Institute, Greenslopes Private Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
| | - Kim R Bridle
- Gallipoli Medical Research Institute, Greenslopes Private Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
| | - Xinxing Li
- Department of General Surgery, Changzheng Hospital, The Second Military Medical University, Shanghai, China
| | - Chun-Xia Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD, Australia
| | - Darrell H G Crawford
- Gallipoli Medical Research Institute, Greenslopes Private Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
| | - Michael S Roberts
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD, Australia
| | - Xiaowen Liang
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD, Australia.,Gallipoli Medical Research Institute, Greenslopes Private Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
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Lefaki M, Papaevgeniou N, Tur JA, Vorgias CE, Sykiotis GP, Chondrogianni N. The dietary triterpenoid 18α-Glycyrrhetinic acid protects from MMC-induced genotoxicity through the ERK/Nrf2 pathway. Redox Biol 2019; 28:101317. [PMID: 31505326 PMCID: PMC6737304 DOI: 10.1016/j.redox.2019.101317] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/28/2019] [Accepted: 09/01/2019] [Indexed: 02/08/2023] Open
Abstract
18α-Glycyrrhetinic acid (18α-GA) is a bioactive triterpenoid that has been shown to activate the nuclear factor (erythroid-derived-2)-like 2 (Nrf2), the main transcription factor that orchestrates the cellular antioxidant response, in both cellular and organismal context. Although various beneficial properties of 18α-GA have been revealed, including its anti-oxidation and anti-aging activity, its possible protective effect against DNA damage has never been addressed. In this study, we investigated the potential beneficial properties of 18α-GA against DNA damage induced by mitomycin C (MMC) treatment. Using human primary fibroblasts exposed to MMC following pre-treatment with 18α-GA, we reveal an Nrf2-mediated protective effect against MMC-induced cell death that depends on extracellular signal-regulated kinase (ERK) signaling. In total, our results reveal an additional beneficial effect of the Nrf2 activator 18α-GA, suggesting that this important phytochemical compound is a potential candidate in preventive and/or therapeutic schemes against conditions (such as aging) or diseases that are characterized by both oxidative stress and DNA damage.
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Affiliation(s)
- Maria Lefaki
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35, Athens, Greece.
| | - Nikoletta Papaevgeniou
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35, Athens, Greece; Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University of Jena, Dornburger Straße 29, 07743, Jena, Germany.
| | - Josep A Tur
- Research Group on Nutrition and Oxidative Stress, Guillem Colom Bldg, Campus, University of Balearic Islands & CIBEROBN (Physiopahotology of Obesity and Nutrition), E-07122, Palma de Mallorca, Balearic Islands, Spain.
| | - Constantinos E Vorgias
- Section of Biochemistry and Molecular Biology, Department of Biology, National and Kapodistrian University of Athens, Zografou Campus, 15701, Athens, Greece.
| | - Gerasimos P Sykiotis
- Service of Endocrinology, Diabetology and Metabolism, Lausanne University Hospital, 1011, Lausanne, Switzerland.
| | - Niki Chondrogianni
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35, Athens, Greece.
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Sun Y, Dai C, Yin M, Lu J, Hu H, Chen D. Hepatocellular carcinoma-targeted effect of configurations and groups of glycyrrhetinic acid by evaluation of its derivative-modified liposomes. Int J Nanomedicine 2018; 13:1621-1632. [PMID: 29588589 PMCID: PMC5862014 DOI: 10.2147/ijn.s153944] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Background There are abundant glycyrrhetinic acid (GA) receptors on the cellular membrane of hepatocytes and hepatocellular carcinoma (HCC) cells. The receptor binding effect might be related to the structure of the guiding molecule. GA exists in two stereoisomers with C3-hydroxyl and C11-carbonyl active groups. Purpose The objective of this study was to investigate the relationship between the HCC-targeted effect and the configurations and groups of GA. Methods and results Different GA derivatives (18β-GA, 18α-GA, 3-acetyl-18β-GA [3-Ace-GA] and 11-deoxy-18β-GA [11-Deo-GA]) were used to investigate the targeting effect of GA’s configurations and groups on HCC cells. The EC50 values of competition to binding sites and the ratio of specific binding in HepG2 cells showed that 18β-GA and 3-Ace-GA demonstrated significant competitive effect with fluorescein isothiocyanate (FITC)-labeled GA. Then, the GA derivatives were distearoyl-phosphatidylethanolamine (DSPE)-PEGylated. 18β-GA-, 18α-GA-, 3-Ace-GA-and 11-Deo-GA-modified liposomes were prepared and characterized by size, zeta potential, encapsulation efficiency, loading capacity, leakage and membrane stability. Evaluation on the cellular location in vitro and tumor targeting in vivo was carried out. Compared to common long-circulation liposome (PEG-Lip), more 18β-GA- and 3-Ace-GA-modified liposomes aggregated around HepG2 cells in vitro in short time and transferred into HCC tumors in vivo for a longer time. Conclusion The β-configuration hydrogen atom on C18 position of GA played the most important role on the targeting effect. C11-carbonyl and C3-hydroxy groups of GA have certain and little influence on targeting action to HCC, respectively. In general, GA might be a promising targeting molecule for the research on liver diseases and hepatoma therapy.
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Affiliation(s)
- Yuqi Sun
- School of Pharmacy, Jinzhou Medical University, Jinzhou, China.,School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Chunmei Dai
- School of Pharmacy, Jinzhou Medical University, Jinzhou, China
| | - Meilin Yin
- School of Pharmacy, Jinzhou Medical University, Jinzhou, China
| | - Jinghua Lu
- School of Pharmacy, Jinzhou Medical University, Jinzhou, China
| | - Haiyang Hu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
| | - Dawei Chen
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China
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He SH, Liu HG, Zhou YF, Yue QF. Liquiritin (LT) exhibits suppressive effects against the growth of human cervical cancer cells through activating Caspase-3 in vitro and xenograft mice in vivo. Biomed Pharmacother 2017; 92:215-228. [DOI: 10.1016/j.biopha.2017.05.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 04/28/2017] [Accepted: 05/05/2017] [Indexed: 01/09/2023] Open
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10
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Papaevgeniou N, Sakellari M, Jha S, Tavernarakis N, Holmberg CI, Gonos ES, Chondrogianni N. 18α-Glycyrrhetinic Acid Proteasome Activator Decelerates Aging and Alzheimer's Disease Progression in Caenorhabditis elegans and Neuronal Cultures. Antioxid Redox Signal 2016; 25:855-869. [PMID: 26886723 PMCID: PMC5124744 DOI: 10.1089/ars.2015.6494] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AIMS Proteasomes are constituents of the cellular proteolytic networks that maintain protein homeostasis through regulated proteolysis of normal and abnormal (in any way) proteins. Genetically mediated proteasome activation in multicellular organisms has been shown to promote longevity and to exert protein antiaggregation activity. In this study, we investigate whether compound-mediated proteasome activation is feasible in a multicellular organism and we dissect the effects of such approach in aging and Alzheimer's disease (AD) progression. RESULTS Feeding of wild-type Caenorhabditis elegans with 18α-glycyrrhetinic acid (18α-GA; a previously shown proteasome activator in cell culture) results in enhanced levels of proteasome activities that lead to a skinhead-1- and proteasome activation-dependent life span extension. The elevated proteasome function confers lower paralysis rates in various AD nematode models accompanied by decreased Aβ deposits, thus ultimately decelerating the progression of AD phenotype. More importantly, similar positive results are also delivered when human and murine cells of nervous origin are subjected to 18α-GA treatment. INNOVATION This is the first report of the use of 18α-GA, a diet-derived compound as prolongevity and antiaggregation factor in the context of a multicellular organism. CONCLUSION Our results suggest that proteasome activation with downstream positive outcomes on aging and AD, an aggregation-related disease, is feasible in a nongenetic manipulation manner in a multicellular organism. Moreover, they unveil the need for identification of antiaging and antiamyloidogenic compounds among the nutrients found in our normal diet. Antioxid. Redox Signal. 25, 855-869.
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Affiliation(s)
- Nikoletta Papaevgeniou
- 1 Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens, Greece .,2 Faculty of Biology and Pharmacy, Institute of Nutrition, Friedrich Schiller University of Jena , Jena, Germany
| | - Marianthi Sakellari
- 1 Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens, Greece .,3 Medical School, Örebro University , Örebro, Sweden
| | - Sweta Jha
- 4 Translational Cancer Biology Program, Research Programs Unit, University of Helsinki , Helsinki, Finland
| | - Nektarios Tavernarakis
- 5 Institute of Molecular Biology and Biotechnology , Foundation for Research and Technology-Hellas, Heraklion, Greece .,6 Faculty of Medicine, Department of Basic Sciences, University of Crete , Heraklion, Greece
| | - Carina I Holmberg
- 4 Translational Cancer Biology Program, Research Programs Unit, University of Helsinki , Helsinki, Finland
| | - Efstathios S Gonos
- 1 Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens, Greece .,3 Medical School, Örebro University , Örebro, Sweden
| | - Niki Chondrogianni
- 1 Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens, Greece
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Rahman MA, Bishayee K, Habib K, Sadra A, Huh SO. 18α-Glycyrrhetinic acid lethality for neuroblastoma cells via de-regulating the Beclin-1/Bcl-2 complex and inducing apoptosis. Biochem Pharmacol 2016; 117:97-112. [PMID: 27520483 DOI: 10.1016/j.bcp.2016.08.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/08/2016] [Indexed: 12/30/2022]
Abstract
18α-Glycyrrhetinic acid (18-GA) is a known gap-junction inhibitor with demonstrated anticancer effects. However, the different modes of cell cytotoxicity for 18-GA remain to be characterized. In this study, 18-GA reduced the expression of cell-cell interaction proteins (N- and VE-cadherin), and led to a dose-dependent increase in cytotoxicity of the neuroblastoma cells tested, but was less toxic toward actively dividing human embryonic kidney cells. We found that 18-GA could induce both autophagy and apoptosis. 18-GA mediated autophagy was due to accumulation of Atg5, Atg7 and LC3II and degradation of p62. Individual siRNAs against Atg5 and Atg7 prevented autophagy and resulted in a further loss of viability with 18-GA. In addition, combination of 18-GA with autophagy inhibitor chloroquine produced a more significant cell death. This implied a pro-survival function for autophagy induction with 18-GA. 18-GA also led to the destabilization of Bcl-2/Beclin-1 interaction and cleavage of Beclin-1, a protein known to play role in apoptosis and autophagy induction. Treatment of cells by a pan-caspase inhibitor or a caspase-3 siRNA prevented a large portion of 18-GA mediated cytotoxicity, demonstrating that caspase-dependent apoptosis induction was responsible for most of the observed cytotoxicity. In terms of signaling, 18-GA led to reduced phosphorylation of all three classes of MAP kinases. Taken together, 18-GA or its pathways may lead to more effective, targeted therapeutics against neuroblastoma.
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Affiliation(s)
- Md Ataur Rahman
- Department of Pharmacology, College of Medicine, Institute of Natural Medicine, Hallym University, South Korea
| | - Kausik Bishayee
- Department of Pharmacology, College of Medicine, Institute of Natural Medicine, Hallym University, South Korea
| | - Khadija Habib
- Department of Pharmacology, College of Medicine, Institute of Natural Medicine, Hallym University, South Korea
| | - Ali Sadra
- Department of Pharmacology, College of Medicine, Institute of Natural Medicine, Hallym University, South Korea
| | - Sung-Oh Huh
- Department of Pharmacology, College of Medicine, Institute of Natural Medicine, Hallym University, South Korea.
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12
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Huang YC, Kuo CL, Lu KW, Lin JJ, Yang JL, Wu RSC, Wu PP, Chung JG. 18α-Glycyrrhetinic Acid Induces Apoptosis of HL-60 Human Leukemia Cells through Caspases- and Mitochondria-Dependent Signaling Pathways. Molecules 2016; 21:molecules21070872. [PMID: 27376261 PMCID: PMC6273602 DOI: 10.3390/molecules21070872] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 06/21/2016] [Accepted: 06/25/2016] [Indexed: 11/29/2022] Open
Abstract
In this study we investigate the molecular mechanisms of caspases and mitochondria in the extrinsic and intrinsic signal apoptosis pathways in human leukemia HL-60 cells after in vitro exposure to 18α-glycyrrhetinic acid (18α-GA). Cells were exposed to 18α-GA at various concentrations for various time periods and were harvested for flow cytometry total viable cell and apoptotic cell death measurements. Cells treated with 18α-GA significantly inhibited cell proliferation and induced cell apoptosis in a dose-dependent manner, with an IC50 value of 100 μM at 48 h. The cell growth inhibition resulted in induction of apoptosis and decreased the mitochondria membrane potential (ΔΨm) and increased caspase-8, -9 and -3 activities. Furthermore, cytochrome c and AIF were released from mitochondria, as shown by western blotting and confirmed by confocal laser microscopy. Western blotting showed that 18α-GA increased the levels of pro-apoptotic proteins such as Bax and Bid and decreased the anti-apoptotic proteins such as Bcl-2 and Bcl-xl, furthermore, results also showed that 18α-GA increased Fas and Fas-L which are associated with surface death receptor in HL-60 cells. Based on those observations, the present study supports the hypothesis that 18α-GA-induced apoptosis in HL-60 cells involves the activation of the both extrinsic and intrinsic apoptotic pathways.
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Affiliation(s)
- Yi-Chang Huang
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan.
| | - Chao-Lin Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 404, Taiwan.
| | - Kung-Wen Lu
- College of Chinese Medicine, School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung 404, Taiwan.
| | - Jen-Jyh Lin
- Division of Cardiology, China Medical University Hospital, Taichung 404, Taiwan.
| | - Jiun-Long Yang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 404, Taiwan.
| | - Rick Sai-Chuen Wu
- Department of Anesthesiology, China Medical University Hospital, Taichung 404, Taiwan.
- Department of Medicine, China Medical University, Taichung 404, Taiwan.
| | - Ping-Ping Wu
- School of Pharmacy, China Medical University, Taichung 404, Taiwan.
| | - Jing-Gung Chung
- Department of Biological Science and Technology, China Medical University, Taichung 404, Taiwan.
- Department of Biotechnology, Asia University, Taichung 413, Taiwan.
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13
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Yu J, Berga SL, Johnston-MacAnanny EB, Sidell N, Bagchi IC, Bagchi MK, Taylor RN. Endometrial Stromal Decidualization Responds Reversibly to Hormone Stimulation and Withdrawal. Endocrinology 2016; 157:2432-46. [PMID: 27035651 PMCID: PMC4891781 DOI: 10.1210/en.2015-1942] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 03/23/2016] [Indexed: 01/08/2023]
Abstract
Human endometrial stromal decidualization is required for embryo receptivity, angiogenesis, and placentation. Previous studies from our laboratories established that connexin (Cx)-43 critically regulates endometrial stromal cell (ESC) differentiation, whereas gap junction blockade prevents it. The current study evaluated the plasticity of ESC morphology and Cx43 expression, as well as other biochemical markers of cell differentiation, in response to decidualizing hormones. Primary human ESC cultures were exposed to 10 nM estradiol, 100 nM progesterone, and 0.5 mM cAMP for up to 14 days, followed by hormone withdrawal for 14 days, mimicking a biphasic ovulatory cycle. Reversible differentiation was documented by characteristic changes in cell shape. Cx43 was reversibly up- and down-regulated after the estradiol, progesterone, and cAMP treatment and withdrawal, respectively, paralleled by fluctuations in prolactin, vascular endothelial growth factor, IL-11, and glycodelin secretion. Markers of mesenchymal-epithelial transition (MET), and its counterpart epithelial-mesenchymal transition, followed reciprocal patterns corresponding to the morphological changes. Incubation in the presence of 18α-glycyrrhetinic acid, an inhibitor of gap junctions, partially reversed the expression of decidualization and MET markers. In the absence of hormones, Cx43 overexpression promoted increases in vascular endothelial growth factor and IL-11 secretion, up-regulated MET markers, and reduced N-cadherin, an epithelial-mesenchymal transition marker. The combined results support the hypothesis that Cx43-containing gap junctions and endocrine factors cooperate to regulate selected biomarkers of stromal decidualization and MET and suggest roles for both phenomena in endometrial preparation for embryonic receptivity.
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Affiliation(s)
- Jie Yu
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
| | - Sarah L Berga
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
| | - Erika B Johnston-MacAnanny
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
| | - Neil Sidell
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
| | - Indrani C Bagchi
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
| | - Milan K Bagchi
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
| | - Robert N Taylor
- Department of Obstetrics and Gynecology (J.Y., S.L.B., E.B.J.-M., R.N.T.), Clinical and Translational Science Institute (J.Y., R.N.T.), and Molecular Medicine and Translational Sciences Program (R.N.T.), Wake Forest School of Medicine, Winston-Salem, North Carolina 27157; Department of Gynecology and Obstetrics (N.S.), Emory University School of Medicine, Atlanta, Georgia 30322; and Departments of Comparative Biosciences (I.C.B.) and Molecular and Integrative Physiology (M.K.B.), University of Illinois Urbana/Champaign, Illinois 61801
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14
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Takeuchi R, Hiratsuka K, Arikawa K, Ono M, Komiya M, Akimoto Y, Fujii A, Matsumoto H. Possible pharmacotherapy for nifedipine-induced gingival overgrowth: 18α-glycyrrhetinic acid inhibits human gingival fibroblast growth. Br J Pharmacol 2016; 173:913-24. [PMID: 26676684 PMCID: PMC4761096 DOI: 10.1111/bph.13410] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 11/27/2015] [Accepted: 12/03/2015] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE This investigation aimed to establish the basis of a pharmacotherapy for nifedipine-induced gingival overgrowth. Gingival overgrowth has been attributed to the enhanced growth of gingival fibroblasts. In this study, we investigated the effects of 18-α-glycyrrhetinic acid (18α-GA) on growth, the cell cycle, and apoptosis and on the regulators of these processes in gingival fibroblasts isolated from patients who presented with nifedipine-induced gingival overgrowth. EXPERIMENTAL APPROACH Gingival fibroblasts were cultured in medium containing 1% FBS with/without 10 μM 18α-GA for 24 or 48 h, and the cell number, cell cycle phase distribution, relative DNA content, apoptotic cell number and morphological characteristics of the cells undergoing apoptosis were measured together with the levels of proteins that regulate these processes and the level of caspase activity. KEY RESULTS 18α-GA significantly decreased cell numbers and significantly increased the percentage of cells in the sub-G1 and G0 /G1 phases of the cell cycle and the number of apoptotic cells. Nuclear condensation and fragmentation of cells into small apoptotic bodies appeared in the fibroblasts treated with 18α-GA. In addition, 18α-GA significantly decreased the protein levels of cyclins A and D1, CDKs 2 and 6, phosphorylated Rb (ser(780) and ser(807/811)), Bcl-xL and Bcl-2 and increased the protein levels of p27, cytosolic cytochrome c, pro-caspase-3, and cleaved caspase-3 and the activities of caspases 3 and 9. CONCLUSIONS AND IMPLICATIONS 18α-GA inhibited gingival fibroblast growth by suppressing the G1 /S phase transition and inducing apoptosis. In conclusion, 18α-GA may be used as a pharmacotherapy for nifedipine-induced gingival overgrowth.
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Affiliation(s)
- R Takeuchi
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - K Hiratsuka
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - K Arikawa
- Department of Preventive and Public Oral Health, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - M Ono
- Department of Oral Surgery, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - M Komiya
- Department of Oral Surgery, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - Y Akimoto
- Department of Oral Surgery, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
| | - A Fujii
- Nihon University, Chiyoda, Tokyo, Japan
| | - H Matsumoto
- Department of Pharmacology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan
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15
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Hosseinzadeh H, Nassiri-Asl M. Pharmacological Effects of Glycyrrhiza spp. and Its Bioactive Constituents: Update and Review. Phytother Res 2015; 29:1868-86. [PMID: 26462981 DOI: 10.1002/ptr.5487] [Citation(s) in RCA: 137] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 07/25/2015] [Accepted: 09/15/2015] [Indexed: 01/26/2023]
Abstract
The roots and rhizomes of various species of the perennial herb licorice (Glycyrrhiza) are used in traditional medicine for the treatment of several diseases. In experimental and clinical studies, licorice has been shown to have several pharmacological properties including antiinflammatory, antiviral, antimicrobial, antioxidative, antidiabetic, antiasthma, and anticancer activities as well as immunomodulatory, gastroprotective, hepatoprotective, neuroprotective, and cardioprotective effects. In recent years, several of the biochemical, molecular, and cellular mechanisms of licorice and its active components have also been demonstrated in experimental studies. In this review, we summarized the new phytochemical, pharmacological, and toxicological data from recent experimental and clinical studies of licorice and its bioactive constituents after our previous published review.
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Affiliation(s)
- Hossein Hosseinzadeh
- Pharmaceutical Research Center, Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Marjan Nassiri-Asl
- Cellular and Molecular Research Center, Department of Pharmacology, School of Medicine, Qazvin University of Medical Sciences, P.O. Box: 341197-5981, Qazvin, Iran
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16
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Domitrović R, Potočnjak I. A comprehensive overview of hepatoprotective natural compounds: mechanism of action and clinical perspectives. Arch Toxicol 2015; 90:39-79. [DOI: 10.1007/s00204-015-1580-z] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 08/11/2015] [Indexed: 12/22/2022]
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17
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Synthesis and biological evaluation of T-OA analogues as the cytotoxic agents. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1737-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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